1,720,990 research outputs found
Recovery and Characterization of the Chestnut Germplasm on the Western Slopes of the Aspromonte in Southern Calabria
No full textFor a considerable period of time chestnuts were a fundamental source of food and economy for the people in the Aspromonte area. After decades in which chestnut cultivation has been neglected as a result of depopulation in mountainous zones, the production capacity in this area has reduced resulting in an erosion of the native germplasm. A survey has been carried out to improve the knowledge about the chestnut germplasm present in this area and to evaluate its qualities with the objective of preserving native genetic resources, safeguarding them from genetic erosion phenomenon and individuating local genotypes of market value which could be used to promote a re-launch of local chestnut cultivation. The research, which was carried out in 2008 on the western slopes of the Aspromonte, has led to the identification of 38 genotypes. The germplasm which was individuated has a considerable rate of variability in that it has different phenological and morphological characteristics. Overall, the 38 genotypes have a ripening period extending from the last 10 days of September until the end of October. With regard to the valuable characteristics of the nuts, the genetic material which was analysed was overall found to be of market value. Most of the genotypes have the characteristics of an episperm which can be easily removed, a seed coat which fails to penetrate the inner kernel or penetrates minimally, and a single embryo. Genotypes with these characteristics will be studied furthermore for creating new chestnut plantations in Calabria
Root architectural traits of rooted cuttings of two fig cultivars: Treatments with arbuscular mycorrhizal fungi formulation
No full textMany fruit tree species develop symbioses relationships with mycorrhizal fungi by which they improve their efficiency in water and nutrient uptake and, in turn, increase their vegetative growth and productivity, particularly under stressful environments. These benefits origin from the effects that mycorrhizal determined on the root architecture, morphology and physiology. Usually, few attentions has been devoted to the tree root structure and function, especially, in fig plants during their growth phase in the nursery. Recently, several root traits or phenes have been reported as fundamental for the root functions such as the root length ratio (plant's potential for the exploitation of soil resources); root mass ratio (allocation traits); the root fineness and tissue density (structural traits); the root very fine, fine and coarse (functional traits). Aim of the study was to test the effects of an arbuscular mycorrhizal fungi (AMF) on the root architecture traits of self-rooted cuttings of two fig (Ficus carica L.) cultivars: Dottato and Natalese. The root architecture traits were evaluated by image analysis system (WinRHIZO). Single root traits and rooting architecture models were statistically tested by univariate and multivariate analysis, respectively. This study confirmed that also the Ficus carica was positively responsiveness to the mycorrhizal inoculation but with cultivar-dependent patterns. Further, the fig with coarse root architecture is more responsive to the fungi inoculation and the AMF induced different root architecture models in Natalese and Dottato suggesting diverse root strategies for exploiting the soil resources
Osservazioni sul ciclo biologico annuale dell'Anona ( Anona Cherimola Mill.) in Calabria
No full textMisura in vivo dell'attività respiratoria di radici di piante di pesco allevate in contenitore in rapporto alla nutrizione minerale e alla crescita radicale
No full textRecupero e caratterizzazione delle accessioni di ciliegio (Prunus avium l.) del germoplasma autoctono della calabria
No full textGrowth, Phenology, Production and Oil quality of the Cultivar Arbequina in high-density hedgerow in four different areas of Italy
No full textThe success of the traditional olive-growing sector in EU countries – characterised by high production costs and a low selling price for the oil – was mainly determined by EU subsidies available for the sector. With the opening of the "free trade" area and a cut in subsidies in 2014, crucial changes in the sector are now needed. In order to increase the competitiveness of EU olive production, attention should be given to new high-yielding, mechanized cultivation systems. In the 90s, Spain introduced new high-density planting systems (1,200-2,000 plants/ha) using three low-vigour and early-fruiting cultivars (‘Arbequina’, ‘Arbosana’ and ‘Koroneiki’). Italian olive production lies in a geographical area that stretches for about 6° in latitude (37°- 43° Latitude N) and in the band of altitude which ranges from sea level to 400 m a.s.l. A number of studies on the ecophysiology of woody plants show the importance of adapting the planting system to the climate of the cultivation site, particularly for high-density groves. The evaluation of cultivars suitable for high-density systems, based on their vegetative characteristics, branching and fruiting, together with an analysis of product quality, may contribute significantly to the development and diffusion of new crop growing systems. To achieve this aim, joint research was carried out by three different research units operating in the three main olive-growing regions of Italy (Sicily, Apulia and Umbria). This paper illustrates the first results (2010 and 2011) obtained by the PRIN Project on “Biological processes and environmental factors affecting the vegetative growth, fruiting and oil quality control in a super high density olive (Olea europaea L.) planting system”
INTRA-CULTIVAR DIVERSITY IN SOUTHERN ITALY OLIVE CULTIVARS DEPICTED BY MORPHOLOGICAL TRAITS AND SSR MARKERS
Full text linkIn this study, SSR analysis was performed on a large number of putative clones of the main olive cultivars from two Italian regions, Sicily and Calabria, in order to study the genetic relatedness, and to detect any degree of genetic diversity, which can be used to unambiguously identify possible superior clones. These putative clones have been collected and observed in the last ten years, following an extensive investigation carried out in traditional olive growing areas, thanks to the reports of farmers, millers, technician, growers and nurseries. The set of microsatellite (SSR) markers used allowed the detection of the genetic diversity, resulting from somatic mutation, indicating the presence of polyclonal cultivars, or having gametic origin, indicating a seedling origin of many clones, which thus share sibling relationships. The presence of superior clones or superior genotypes is discussed
Variazione di alcuni parametri qualitativi in frutti di pesco della cv Rich May in due combinazioni d'innesto
No full textGoing Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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